What's the version of the software? If The IU22 have not a label with the word XMATRIX maybe is not compatible with the transducers. I am a Field Service Engineer from Philips.
iu22 - probe not recognized (x5-1, L11-3)
The X5-1 and L11-3 will only run on the iE33 systems. If you should need further assistance with your iU22 or have any other questions on compatibility issues with the probe and your iU22 system, please do not hesistate to reach out to MW Imaging at firstname.lastname@example.org or 8778898223